<template>
	<el-container>
		<!-- 头部区域 -->
		<el-header>
			<div>
				<img src="../assets/heima.png" alt="" />
				<span>电商后台管理系统</span>
			</div>
			<el-button type="info" @click="logout">退出</el-button>
		</el-header>
		<!-- 页面主体区域 -->
		<el-container>
			<!-- 侧边栏 -->
			<el-aside :width="isCollapse ? '64px' : '200px'">
                <div class="toggle-button" @click="toggleCollapse">|||</div>
				<!-- 侧边栏菜单区 -->
				<el-menu
					background-color="#333744"
					text-color="#fff"
					active-text-color="#409eff"
					:unique-opened="true"
                    :collapse="isCollapse"
                    :collapse-transition="false"
                    router
                    :default-active="activePath"
				>
					<!-- 一级菜单 -->
					<el-submenu
						:index="item.id + ''"
						v-for="item in menulist"
						:key="item.id"
					>
						<template slot="title">
							<i :class="iconsObj[item.id]"></i>
							<span>{{ item.authName }}</span>
						</template>
						<!-- 二级菜单 -->
						<el-menu-item
							:index="'/' + subItem.path"
							v-for="subItem in item.children"
							:key="subItem.id"
                            @click="saveNavState('/' + subItem.path)"
						>
							<template slot="title">
								<i class="el-icon-menu"></i>
								<span>{{ subItem.authName }}</span>
							</template>
						</el-menu-item>
					</el-submenu>
				</el-menu>
			</el-aside>
			<!-- 右侧内容 -->
			<el-main>
                <router-view></router-view>
            </el-main>
		</el-container>
	</el-container>
</template>

<script>
export default {
	data() {
		return {
			// 左侧菜单数据
			menulist: [],
			iconsObj: {
				125: 'iconfont iconyonghu',
				103: 'iconfont iconanniuquanxianguanli',
				101: 'iconfont iconshangpinguanli',
				102: 'iconfont icondingdanguanli',
				145: 'iconfont iconshujutongji',
            },
            //是否折叠侧边栏
            isCollapse: false,
            //被激活的链接地址 默认为空
            activePath: ''
		}
    },
    //生命周期函数
	created() {
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
	},

	methods: {
		logout() {
			window.sessionStorage.clear()
			this.$router.push('/login')
		},
		//获取所有菜单
		async getMenuList() {
			const { data: res } = await this.$http.get('menus')
			if (res.meta.status !== 200)
				return this.$message.error(res.meta.msg)
			this.menulist = res.data
			console.log(res)
        },
        // 实现菜单的折叠与展开
        toggleCollapse() {
            this.isCollapse = !this.isCollapse
        },
        //保存连接的激活状态
        saveNavState(activePath) {
            window.sessionStorage.setItem('activePath', activePath)
            this.activePath = activePath
        }
	},
}
</script>

<style>
.el-header {
	background-color: #373d41;
	display: flex;
	justify-content: space-between;
	align-items: center;
	padding: 0px;
	color: #fff;
	font-size: 20px;
}
.el-header > div {
	display: flex;
	align-items: center;
}
.el-header > div span {
	margin-left: 15px;
}

.el-aside {
	background-color: #333744;
}
.el-aside .el-menu {
	border-right: none;
}

.el-main {
	background-color: #eaedf1;
}
.el-container {
	height: 100%;
}
.iconfont {
	margin-right: 10px;
}
.toggle-button{
    background-color: #4a5064;
    font-size: 10px;
    line-height:24px;
    color: #fff;
    text-align:center;
    cursor: pointer;
    letter-spacing: 0.2em;
}
</style>